Optical film and narrow frame display device

Abstract

A light-redirecting optical film includes a continuous plurality of micro structures. The micro structures have a common bottom surface and each micro structure includes a first curved surface and a second curved surface. The first curved surface is convex towards the second curved surface. The second curved surface rises from the bottom surface. The first curved surface and the second curved surface meet along a top edge. The curvature of the top edges in the optical film is the same. The first curved surface is a total reflecting surface. A narrow frame display device is also presented.

What is claimed is: 
     
       1. A narrow frame display device comprising:
 a plurality of display units collectively defining an array with no gap between the plurality of display units; each of the display units comprising: 
 a display panel comprising a display surface and a non-display surface opposite to the display surface; 
 a frame being formed on the edge of the display panel and surrounding the display panel; and 
 a backlight module corresponding to the non-display surface; 
 wherein the display units further comprises a central area, a fringe area surrounding the central area and a frame area surrounding the fringe district, the frame corresponds to the frame district, and the display panel corresponds to the central area and the fringe area; and 
 a plurality of optical films being defined on the surface of the display units and corresponding to the frame district and the fringe district, each of the optical films comprising: 
 a plurality of micro structures being continuous and having a common bottom surface, every micro structure comprising a first curved surface and a second curved surface, the first curved surface being convex in relation to the second curved surface, and the second curved surface rising from the bottom surface; 
 wherein the first curved surface and the second curved surface meet and define a top at the line of meeting, the curved direction of the tops in the optical film being the same, and the first curved surface being a total reflecting surface. 
 
     
     
       2. The narrow frame display device of  claim 1 , wherein there is a single radius of curvature of the first curved surface, which is 10 micrometers. 
     
     
       3. The narrow frame display device of  claim 1 , wherein the four optical films formed on one display unit are substantially symmetrical about horizontal and vertical lines which meet in the center. 
     
     
       4. The narrow frame display device of  claim 1 , wherein the two optical films formed on two different and adjacent display units are essentially one-piece and substantially symmetrical about the line of contact between the two. 
     
     
       5. The narrow frame display device of  claim 1 , wherein the optical films are defined on the display surface. 
     
     
       6. The narrow frame display device of  claim 1 , wherein the display unit further comprises a hyaline glass cover which is used to protect the display panel, the optical films are defined on the hyaline glass cover. 
     
     
       7. The narrow frame display device of  claim 1 , wherein the backlight module comprises a number of backlights, a printed circuit board and a diffusion plate; the printed circuit board corresponds to the non-display surface; the display panel, the frame and the printed circuit board collectively define a space; and the backlights and the diffusion plate are all fixed in the space. 
     
     
       8. The narrow frame display device of  claim 7 , wherein, the backlights are uniformly fixed on the printed circuit board and electrically connected to the printed circuit board. 
     
     
       9. The narrow frame display device of  claim 7 , wherein, the diffusion plate is fitted closely to the non-display surface and is aligned with the backlights. 
     
     
       10. The narrow frame display device of  claim 7 , wherein, the printed circuit board is fixed below the display panel by the frame. 
     
     
       11. The narrow frame display device of  claim 7 , wherein, the diffusion plate is fixed by supporting structure. 
     
     
       12. The narrow frame display device of  claim 7 , wherein, the frame is made of opaque resin material. 
     
     
       13. The narrow frame display device of  claim 12 , wherein, the color of the frame is black.